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[LUG] Dual booting Debian and Ubuntu

 

I have a Lenovo laptop, nominal 320Gb HD partitioned as follows:

sda1 30Gb ext3 flagged 'Boot' with Ubuntu 9.04 amd64 installed
sda2 30Gb unknown filesystem (probably not formatted) nothing installed
sda3 4Gb Linux Swap
sda4 Extended, containing
        sda5 230Gb ext3 /home

I would like to install another distro on sda2, preferably Debian Lenny
32bit so I can dual boot, but I am concerned about breaking Grub etc. I
don't want to virtualise Debian within Ubuntu, as one of the objectives
is to be able to boot from an alternative system if I break Ubuntu.

I have looked online for information to guide me, but found nothing on
Ubuntu Forums or Debian, or via Google search (although plenty on dual
booting with Windows which I have done in the past, and also
virtualisation). I am a bit concerned about experimenting, as I have
come across horror stories about broken MBR and Grub.

Can anyone on the list point me towards any information (online or
paper) on how to do this?

Many thanks

Phil Whateley




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